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Updated: Aug 5, 2026
08:29
Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer
Published on: January 10, 2017
Additive-Free, Efficient, and Stable All-Polymer Solar Cells Enabled by Congeneric Molecule Construction for
Henan Li1, Suxiang Ma2, Sergio Gámez-Valenzuela3
1School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou, Jiangxi, P. R. China.
Angewandte Chemie (International Ed. in English)
|July 26, 2026
Summary
Researchers developed additive-free all-polymer solar cells (all-PSCs) using structural homology. This strategy enhances molecular ordering and compatibility, achieving record efficiency and stability for wearable electronics.
Area of Science:
- Materials Science
- Organic Electronics
- Renewable Energy
Background:
- All-polymer solar cells (all-PSCs) are promising for wearable electronics due to their stability and voltage.
- Current all-PSCs often require processing additives, which negatively impact long-term stability.
- Poor morphology and donor-acceptor compatibility are key challenges in all-PSC development.
Purpose of the Study:
- To introduce a novel structural homology strategy for additive-free all-PSCs.
- To enhance molecular ordering, intermolecular interactions, and donor-acceptor compatibility.
- To achieve high power conversion efficiency and improved stability in all-PSCs.
Main Methods:
- Designed donor and acceptor polymers sharing a common bithiophene imide building block.
- Utilized chemical homology to reduce the Flory-Huggins interaction parameter.
- Fabricated additive-free all-PSCs and characterized their performance and stability.
Main Results:
- Achieved an open-circuit voltage of 0.94 V, surpassing the benchmark PM6:Y6 system.
- Demonstrated a record power conversion efficiency of 19.12% for additive-free all-PSCs.
- Exhibited exceptional thermal stability (1128 h) and photostability (756 h).
Conclusions:
- Structural homology effectively eliminates the need for processing additives in all-PSCs.
- The developed additive-free all-PSCs offer a practical pathway for next-generation flexible and wearable electronics.
- A large-area all-polymer module demonstrated a self-sustaining, solar-rechargeable system.
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